Hydraulic shock absorber optimizes against the risks of tailgating

摘要

The invention relates to a vehicle hydraulic shock absorber comprising: a reservoir (301) filled with hydraulic fluid; a piston (373) slidably mounted in the reservoir; a shaft (371) extending in the axial direction on a first side relative to the piston; a distributor (307) comprising: a primary orifice (324) opening into the reservoir on a second side of the piston, the primary orifice being in communication with a first fluid flow circuit; and a secondary orifice (325) opening into the reservoir on the second side of the piston and in communication with a second fluid flow circuit the pressure drop across which is greater than the pressure drop across the first flow circuit; a protrusion (380) separated from the primary orifice over a first part of the stroke of the piston and closing off the primary orifice over a second part of the stroke of the piston.